9532

• UCREFRP Catalog Number: 9532
• Author: Anderson, R. and G. Stewart.
• Title: Riverine Fish Flow Investigations.
• USFW Year: 2000.
• USFW - Doc Type: Fort Collins.
• Copyright Material: NO

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Figure 1. Location of the two study sites on the Yampa River, the Sevens at River Mile 63
and Duffy at River Mile 109.5.

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have not been consistently above the median (which is 128 cfs) for the last five years (Figure

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3). The minimum flow in 1999 was 168 cfs and 115 cfs in 1998. The 10-day minimum flow

for both 1998 (179 cfs) and 1999 (212 cfs) however has been above the median (153 cfs)

indicating that base flow conditions during the last two years have also been medial

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(Figure 3).

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Gage records for Maybell (RM86) were compared to gage records from above the

Maybell diversion canal (RM 89) by combining flow from the Yampa River at Craig (RM

134) and the Williams Fork at its confluence with the Yampa (RM 130). Gage recording

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began for Craig and William Fork in October 1984, so the comparison represents the last 15

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